[petsc-users] Is it possible to have two decompositions in one system

[Danyang Su]

Hi All,

I have flow and reactive transport equations in one system. The share 
the same domain decomposition. Usually solving flow equations takes much 
less time than reactive transport equations, say 10% vs 90%. For some 
extreme cases, the flow equations are not well scaled while reactive 
transport equations are well scaled. The performance for flow equations 
may get worse when use more processors. Is it possible to set different 
number of processors for flow and reactive transport equations? E.g, 16 
processors for flow equations and 128 processors for reactive transport 
equations.

Thanks,

Danyang